#include<iostream>
using namespace std;
struct TreeNode {
     int val;
     struct TreeNode *left;
     struct TreeNode *right;
};
bool isSameTree(struct TreeNode* p, struct TreeNode* q)
{
    if(!p&&!q)return true;
    if(!p||!q)return false;
    if(p->val!=q->val)return false;
    return isSameTree(p->left, q->left)&&isSameTree(p->right, q->right);
}

bool isSubtree(struct TreeNode* root, struct TreeNode* subRoot){
    if(root==NULL)return false;
    if(isSameTree(root, subRoot))return true;
    return isSubtree(root->left,subRoot)||isSubtree(root->right, subRoot);
}